- Category: Water Feature
- Type: Inland Water
- Latitude/Longitude: 52°20'31"N 3°42'20"W
- Eastings/Northings: 283890, 272925
- OS Grid: SN838729
- Mapcode Local: GBR 98.TG8P
- Mapcode Global: VH5CD.QD7D
Location and coordinates are for the approximate centre of Llyn Gwngu within this administrative area.
Geographic features and populated places may cross administrative borders.